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i <br /> Gettler-Ryari/Geostrategies(1) Project Tosco(1) <br /> 6747 Sierra Court, Suite J Project Number Unocal Circle K SS41205,Lathrop,CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 05/10/01 15 16 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LL1FT --- <br /> Sequoia <br /> _Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-3(L104181-04)Water Sampled 04/26/0112 25 Received 04/26/01 17 35 <br /> Purgeable Hydrocarbons as Gasoline 5350 1000 ug/1 20 1050031 05/09/01 05/09/01 DHS LUFr P-02 <br /> Benzene 149 100 " <br /> Toluene ND too " <br /> Ethylbenzene 256 100 IF1. " <br /> Xylenes(total) 101 too <br /> Methyl tert-butyl ether ND 100 " <br /> Surrogate a,a,a-Triuorotoluene 927% 70-130 " <br /> IF <br /> MW-4(L104181-05)Water Sampled 04/26/0111 50 Received 04/26/01 17 35 <br /> Purgeable Hydrocarbons as Gasoline 1430 250 ug/1 5 1050036 05/10/01 05/10/01 DHS LUFF P-02 <br /> Benzene 947 2 50 " <br /> Toluene ND 250 " <br /> Ethylbenzene 716 2 50 " <br /> Xylenes(total) 335 2 50 IF IFIt " <br /> Methyl tert-butyl ether ND 250 IF " <br /> —0 <br /> Surrogate a a a-Trtfluoratoluene 105% 70-130 " <br /> MW-5(L104181-06)Water Sampled 04/26/01 14 40 Received 04/26/01 17 35 <br /> Purgeable Hydrocarbons as Gasoline 73000 10000 ugJl 200 1050036 05110!01 05/10/01 DHS LUFT P-02 <br /> Benzene 103 100 " " " " <br /> Toluene 770 100 IF <br /> Ethylbenzene 5360 100 IFIF " <br /> Xylenes(total) 30200 100 IFIF " <br /> 11 <br /> Methyl tert-butyl ether ND 1000 IFI. " <br /> Surrogate a,a,a-Trifluorotoluene III % 70-130 IF IF IF <br /> Sequoia Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the cha <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 3 of 16 <br />